Showtime’s aim is true as it airs the documentary “Elvis Costello: Mystery Dance” at 9 p.m., offering a look into his life and his extraordinary career.

SyFy’s messy but acceptably watchable “12 Monkeys” packs it in for its first season at 9 p.m. And there’s TNT’s “Cold Justice” launching its spring premiere at 8 p.m. Also on SyFy, the second season finale of “Helix” at 10 p.m.

The second episode of E’s new “The Grace Helbig Show” airs at 10:30 p.m., right after “The Soup.” I caught the premiere last week and wasn’t really all that impressed. She plays much better on YouTube than on TV, but maybe the show will improve with time. Then again, it’s E, and they don’t really care. The only shows worth watching are “The Soup” and “The Royals” at the moment.

Only two things really worth your attention tonight: Kevin Hart’s special on Comedy Central, “Kevin Hart Presents: Plastic Cup Boys” at 10 p.m., and the “Cookie” monster herself, Taraji P. Henson hosting “Saturday Night Live” at 11:29 p.m. on NBC. I hope she brings some of the other “Empire” stars for a bit of “drip, drop, drip-drippity drop” music. But the official musical guests are Mumford & Sons.

SUNDAY

HBO owns the night and everyone else may as well just go home. The fifth season of “Game of Thrones” begins at 9 p.m. and it’s terrific. Chaos is come again in the old Seven Kingdoms and you can’t look away.

Then sit back and laugh with the season premieres of Mike Judge’s spot-on “Silicon Valley” at 10 p.m., followed by “Veep” at 10:30 on HBO.

The seventh season of Showtime’s “Nurse Jackie” begins at 9 p.m. I’ll still watch anything Edie Falco is in, but the show has outlived its sell-by date by a couple of seasons. This season will be the last, so maybe it will regain some traction.

David Wiegand is an assistant managing editor and TV critic for the San Francisco Chronicle. A native of Rochester, N.Y., he holds a bachelor's degree in English and a master's in journalism from American University in Washington, D.C.

He joined The Chronicle in 1992 as a copy editor with the arts section and became entertainment editor in 1995 and executive features editor in 2006. He took on the job of television critic in 2010, writing regular TV reviews and columns not only for The Chronicle but for other papers in the Hearst chain.

Before The Chronicle, he was managing editor of Dole Newspapers in Somerville, Mass., and editor of the Amesbury (Mass.) News.